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Discussion Starter #1
Dear all,

I had four NS-II tires on my 2010 Mazda3. 205/50R17 NANKANG NS-II ULTRA SPORT 93V BSW

I hit a curb with the rear right tire and replaced it.

The mechanic used a NS-20. : NANKANG NS-20 NOBLE SPORT : 205/50R17 93V XL

Since the replacement I have had loud sound coming from the rear LEFT tire. That sound has seemed intermittent for the last three months but now seems a little more constant: Either that or I just got fed up with it and finally paid some attention. The rear left tire is one of the original NS-II's.

I took a photograph of it and it looks like it may be unidirectional and on backward.

I'm trying to determine: is it possible that its the direction the left rear tire was mounted? Is it more likely that it is because the treads of the two rear tires no longer match?

What options do I have here?

Thanks and thank you all for your time and consideration.:tank:


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Celest Zoom-Zoom
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Based on the tread pattern the driver rear is a directional tire but it's mounted the right way. Have you checked for the obvious things. Bubbles, nails, etc.
 

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Discussion Starter #3
I'll go stare at it some more and rotate it a little. I don't think anything is wrong with the tire though.
 

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Celest Zoom-Zoom
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I'll go stare at it some more and rotate it a little. I don't think anything is wrong with the tire though.
There very well may not be. Our 2.5 had a similar issue with the factory tires. We had a clunking coming from the front and rotated the front tires to the back. It went away for a while then came back. There was nothing visually wrong with the tires. We then just decided to replace the tires and it has been gone ever since.
 

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Silver Surfer
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rotate the tire you think that is making noise to the opposite side properly.. then see if the sound moves with it.. if it does then the the odd tire is causing the noise.. if there's nothing wrong with the tire visually it could only be the tread pattern. some tread patterns cause more noise than others
 
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